Coating for the preservation of wood, pasteboard, masonry, leather, sheet iron, etc.



' To all whom, it may concern:

umrso STATES PATENT OFFICE- EUGEN BECK, OF CHARLO'ILTENBURG, GERMANY, ASSIGNQR T FREESES-IATENT OF ,CHARLOTTENBURG, GERMANY.

EISENSGHUTZ UND SCHRAUBENWELLENBEKLEIDUNG FUR SCI-HFFE G. M. 3. BL,

- ooe'rrns FOR THE PRESERVATiONOF WOOD,-15ASTEBOARD, MASONRY, LEATHER,

snnn'r IRON, ETC. 0

1,418,172. 1H0 Drawing.

Be it known that I, EUGEN' Back, a citifun of the German Republic, and resident of Charlottenburg, Germany, have invented certain new and useful Improvements in an. Improved Coating for the Preservation of Wood, Pasteb'oard, Mason Leather, Sheet 1 Iron, Fabric, and the like gfo 1' which I have made application in Germany Oct. 25, 1919), of which the followingis a specificatiorn The object of'this invention is to provide an improved coating for the preservation of wood, pasteboard,g masonry, leather, sheet iron, fabric and the like).

The improved coating is composed of minium and tar, with the addition of a suitable diluting product and colouring substances if desired. A mixture of 3 to 5 arts of miniumand 1 to .2 parts of woo tar with the addition of turpentine or its equivalent has been found particularly convenient. For the ingredients mentioned, their. chemical equivalents may be substituted, for instance, zinc-white maybe substituted for niinium and xylidin. for turpentine.

The coating has properties which could not be expected from the'same. The coating without diluting liquid composed of 4 to 5 parts of minium and 1 part of wood tar has been proposed heretoforevmerely for the purpose of coating I screw-shafts of ships against rust. Y

The surface coated with; the improved mass and treated with a brush becomes bright in a very particular way, for' instance the surfaceof sheet iron. If the surface is coated twice, it will become bright and brilliant'likeenamel. I V It isa very important feature that the coating, combines with the body to be protected and forms an. insoluble compound,

whereby a compact non porous'surface an articles forming the surface of the coatmg is such that for instance a piece ofsheet iron coated with the'improvedmass may be; bent through an angle of 180, that is nearly sible owing Specification of Letters Patent. Patented May 39,1922. Application filed January 6, 1921. Serial No. 435,564. I

folded upon itself, and then straightened pound is produced-at least with porous bodies such as wood,pasteboard', leather and the like by the fact that the mass enters the'pores thereof whereby an extremely-ethclent surface adhesion Will be secured. The

, coating mass and the mass of'the body are rather melted together with the'result that It may be said'that the insoluble coma new body will be formed. Thus pasteboard coatedwith the improved mass has n cross section three distinct layers, viz, the layer of 'pasteboard,'a layer of pasteb'oard impregnated with the. coating mass,

and the surface layer Such 'pasteboard is designed according to this .inventionto be sold as a new article of manufacture, for instance as a substitute for press-spahn commonly used in electrical industry. 'Owing toits particular treatment press-spahn is expensive. Pasteboard coated on one or both sides with the improved mass is cheaper and has. high grade insulating properties, which has been found. 'by practical experiments. And as the coating mass, as already stated, forms asuperior protecting means against moistness, 'it may also be used in electrical industry in cases where the use of press-spahn is indesirable or imposto the fact that it is capable of absorbing moistness. to the process used in its manufacture pressspahn is very rigid, whilst pasteboard treated with the improved coating remains yieldable.-

Owingfto improved coating mass may be applied or used on a large scale. Besides the scope of application described above, said mass may also be used in the manufacture of bri ht pasteboard for 'book bindings, parti'cu ar bo-ardings and pasteboard trunks. .liabr'ic treated with the improved coating mass becomes watertight, and therefore it may be advantageously used for impregnating tents, tilts andthe like.

The combination of thecoating mass with sheet iron which resists to all practical con- Furthermore owing.

coating toys of sheet metal.

Leather treated with the improved coating mass has the nature and appearance of varnished leather.

It will be obvious that it is impossible to enumerate all the possibilities of uses of the improved coating mass and therefore we wish it to be understood that applications which are not mentioned in this specification are also contemplated by my invention.

Having now fully described my said invention, what I claim and desire to secure by Letters Patent, is:

1. An improved coating for the preservation of wood. pasteboard, masonry, leather, sheet iron, fabric and the like, composed of minium, tar and a diluting liquid mixed together, substantially as set forth.

2. An improved coating for the preservation of wood, pasteboard, masonry, leather, sheet iron, fabric and the like, composed of .minium, tar, diluting liquid and coloring substances mixed together, substantially as set forth.

3. An improved coating for the preservation of wood, pasteboard. masonry, leather,

sheet iron, fabric and the like. composed of 2-5 parts of minium and 12 parts of woodtar, mixed with a diluting liquid, substantially as set forth.

4. 'As a new article of manufacture pasteboard coated with a mixture of minium, wood-tar and diluting liquid, substantially as set forth.

5. As a new article of manufacture, pasteboard coated on both sides with a mixture of minium, wood-tar and diluting liquid, substantially as set forth.

6. As a new a'rticfe of manufacur'e, pasteboard coated with a mixture of 2-5 parts of minium, 1-2 parts of wood-tar and a diluting liquid, substantially as set forth.

7. An improved coating for the preservation of wood, pasteboard, masonry,

9.'An improved coating. for the preservation of wood. pasteboard, masonry, leather, sheet iron, fabric, and the like, composed of three fifths parts of minium, and approximately one part of wood-tar mixed with a diluting fluid.

10. As an article of manufacture, pasteboard coated with a mixture of threefifths parts of minium, approximately one part of wood-tar, and a diluting liquid.

In testimony whereof I have hereunto set my hand in presence of two witnesses.

' EUGEN BECK.

\Vitnesses C. GEORGES DELBROUCK, HENRI DETMET. 

